

package com.hazelcast.client.impl.protocol.task.map;

import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.MapExecuteOnKeysCodec;
import com.hazelcast.client.impl.protocol.task.AbstractMultiPartitionMessageTask;
import com.hazelcast.instance.impl.Node;
import com.hazelcast.internal.nio.Connection;
import com.hazelcast.internal.partition.IPartitionService;
import com.hazelcast.internal.serialization.Data;
import com.hazelcast.internal.util.collection.PartitionIdSet;
import com.hazelcast.map.EntryProcessor;
import com.hazelcast.map.impl.MapEntries;
import com.hazelcast.map.impl.MapService;
import com.hazelcast.map.impl.operation.MapOperationProvider;
import com.hazelcast.security.SecurityInterceptorConstants;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.MapPermission;
import com.hazelcast.spi.impl.operationservice.OperationFactory;

import java.security.Permission;
import java.util.*;

public class MapExecuteOnKeysMessageTask extends AbstractMultiPartitionMessageTask<MapExecuteOnKeysCodec.RequestParameters> {

    public MapExecuteOnKeysMessageTask(ClientMessage clientMessage, Node node, Connection connection) {
        super(clientMessage, node, connection);
    }

    @Override
    protected OperationFactory createOperationFactory() {
        EntryProcessor processor = serializationService.toObject(parameters.entryProcessor);
        MapOperationProvider operationProvider = getMapOperationProvider(parameters.name);
        return operationProvider.createMultipleEntryOperationFactory(parameters.name, new HashSet<>(parameters.keys), processor);
    }

    @Override
    protected Object reduce(Map<Integer, Object> map) {
        List<Map.Entry<Data, Data>> entries = new ArrayList<>();

        MapService mapService = getService(MapService.SERVICE_NAME);
        for (Object o : map.values()) {
            if (o != null) {
                MapEntries mapEntries = (MapEntries) mapService.getMapServiceContext().toObject(o);
                mapEntries.putAllToList(entries);
            }
        }
        return entries;
    }

    @Override
    public PartitionIdSet getPartitions() {
        IPartitionService partitionService = nodeEngine.getPartitionService();
        int partitions = partitionService.getPartitionCount();
        PartitionIdSet partitionIds = new PartitionIdSet(partitions);
        Iterator<Data> iterator = parameters.keys.iterator();
        int addedPartitions = 0;
        while (iterator.hasNext() && addedPartitions < partitions) {
            Data key = iterator.next();
            if (partitionIds.add(partitionService.getPartitionId(key))) {
                addedPartitions++;
            }
        }
        return partitionIds;
    }

    @Override
    protected MapExecuteOnKeysCodec.RequestParameters decodeClientMessage(ClientMessage clientMessage) {
        return MapExecuteOnKeysCodec.decodeRequest(clientMessage);
    }

    @Override
    protected ClientMessage encodeResponse(Object response) {
        return MapExecuteOnKeysCodec.encodeResponse((List<Map.Entry<Data, Data>>) response);
    }


    @Override
    public String getServiceName() {
        return MapService.SERVICE_NAME;
    }

    @Override
    public Permission getRequiredPermission() {
        return new MapPermission(parameters.name, ActionConstants.ACTION_PUT, ActionConstants.ACTION_REMOVE);
    }

    @Override
    public String getDistributedObjectName() {
        return parameters.name;
    }

    @Override
    public String getMethodName() {
        return SecurityInterceptorConstants.EXECUTE_ON_KEYS;
    }

    @Override
    public Object[] getParameters() {
        return new Object[]{parameters.keys, parameters.entryProcessor};
    }

    @Override
    protected String getUserCodeNamespace() {
        return MapService.lookupNamespace(nodeEngine, getDistributedObjectName());
    }
}
